class student:
    def __init__(self, name, age, course):
        self.name = name
        self.age = age
        self.course = course

    def get_name(self):
        return self.name
    def get_age(self):
        return self.age
    def get_course(self):
        return max(self.course)

zm = student("los", 20, [30,40,50])
print(zm.get_course())